I use the Brendan's Powerbender book CD quite often for the backing tracks. One of the tracks (I believe in the 79-80 range) has all the keys in the book and cycles through them. It is great practice.
Does anyone know of a similar track where individual key has a few more measures before it changes to another key? It would be nice to have a few tracks such as this on a CD to practice the multiple positions/keys.
If Brendan checks this out, I would happily pay for the tracks that are already produced in this expanded format.